I have a friend who tries to upload a company logo as banner on a Facebook group, but it seems like Facebook compress or change the image in some way after upload, so the resolution gets scrambled. Does anyone know what it does, and what format/size gives the best result?
migrated from superuser.com May 13 '11 at 9:27
Most probably they compress it to a degree; otherwise they would have too much of a bandwidth/space problem; this is pretty normal among alot of social networking sites.
I doubt anyone would know the specifics of how FB does it.